Month: October 2020 Articles

HP-35 Red Dot

HP-35 Red Dot

Oct 11, 2020

This...

HP-41 Prototype Modules

HP-41 Prototype Modules

Oct 7, 2020

Thes...

HP-42C Prototype from HP-41CX

HP-42C Prototype from HP-41CX

Oct 7, 2020

Here...

Guard dogs

Guard dogs

Oct 7, 2020

Calculators being very valuable items, they are always guarded by fierce guard dogs.